99897558 has 16 divisors (see below), whose sum is σ = 205195440. Its totient is φ = 32399136.

The previous prime is 99897517. The next prime is 99897583. The reversal of 99897558 is 85579899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224773 + ... + 225216.

It is an arithmetic number, because the mean of its divisors is an integer number (12824715).

Almost surely, 2^99897558 is an apocalyptic number.

99897558 is an abundant number, since it is smaller than the sum of its proper divisors (105297882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99897558 is a wasteful number, since it uses less digits than its factorization.

99897558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450031.

The product of its digits is 8164800, while the sum is 60.

The square root of 99897558 is about 9994.8765875322. The cubic root of 99897558 is about 464.0003313266. Note that the first 3 decimals are identical.

The spelling of 99897558 in words is "ninety-nine million, eight hundred ninety-seven thousand, five hundred fifty-eight".